I find a lot of Memotech games very hard to complete. Maybe (mainly) Continental Software, felt they had to make the games so hard, to not let the consumer, think they payed top£££ for a game could be completed in a few hours?
But did anyone complete Star Command, I have disassembled the game, and found a way not to use any energy

Another very hard game is Super Minefield. Actually Super Minefield calculates all 9 levels, when you start that why you have the "WAIT WAIT WAIT WAIT" screen, I changed that when I ported the game to ColecoVision, mainly cause the ColecoVision only have 1024bytes of ram.
Blobbo is also quite hard game, A bit unfair too, The Ghosts can kill you if they are next to you, even around the corner.
Back In the days I had:
Super Minefield
Draughts
Kilopede
Toado
Star Command
Astromilon
Reversi
Nemo
Astropac
Blobbo
Fathoms Deep.
The first 4 at the list was included with the Memotech MTX 512 when I got it 27th april 1987. The other games I pickup in two local computershops which still had Software for the Memotech (By Local I mean 14km and 19km away) sometimes i becycle there, but mostly my mother drove me. As I remember the games was between 6£ and 10£ that time, but it was in 1987 where the Memotech have been dead for quite long time.